FabLayout

Stub up calculator

Enter the stub height and your bender's take-up. You get where to mark the conduit from the end for a 90° stub-up.

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Stub-up

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Mark from endMark from end77″″Stub heightStub height1212″″Take-upTake-up55″″
Scale drawing

Mark from the end

7in

Exact geometry

Take-up
5 in
  • Line the arrow on the bender up with the mark, the stub end toward the hook side.

How to lay it out

  1. Measure the stub height

    Measure from the floor or other reference to where the end of the stub has to finish, to the back of the 90°.

  2. Read your take-up

    Find the take-up stamped on your bender for this size and type of conduit, and enter it if it is not 5″.

  3. Mark from the end

    Measure the mark from the end of the conduit and wrap it right around the pipe.

  4. Bend the 90°

    Put the arrow on the mark, with the stub end toward the hook side, and bend to 90°.

  5. Check the height

    Measure the finished stub to the back of the bend before you cut or install anything.

Good to know

  • Line the arrow on the bender up with the mark, the stub end toward the hook side.
  • FabLayout runs the same code as Truemark; the result is exact geometry.
  • Source: Klein Tools 51603 ½″ EMT hand bender product page (centre-line radius 4⅝″); 5″ take-up from industry reference; Greenlee Site-Rite Hand Bender Instruction Manual, IM 1071 Rev 4 (read the value on the bender)

Method and formula

A stub-up is a single 90° bend near the end of the pipe. The bender's shoe uses up some of the stub length as it forms the bend; that amount is the take-up. You subtract it from the height you want and mark there.

  • Mark from the end = stub height − take-up.

Take-up depends on the bender and the conduit size and type, so read the value on your own bender. This page starts at 5″ for a ½″ EMT hand bender with a 4⅝″ centre-line radius (Klein Tools 51603). Klein publishes the radius on the product page; the 5″ take-up is an industry reference value and the figure cast on the bender, not a number on that page. A stub shorter than the take-up cannot be made with that bender.

Worked example

The page defaults: a 12″ stub with a 5″ take-up. The mark goes 12 − 5 = 7″ from the end. Line the arrow up with it and bend to 90°; the back of the bend finishes 12″ from the end.

Questions

What is take-up?

The length the bender uses as it forms a 90°. Mark the stub height minus the take-up, bend on the arrow, and the back of the bend lands at the height you wanted.

Why does the take-up differ between benders?

It depends on the shoe radius and the conduit size and type. A ½″ EMT hand bender is around 5″; larger sizes and electric benders need more. Use the value stamped on your bender.

What if my stub is shorter than the take-up?

That stub cannot be bent with this bender. Bend a longer stub and cut it down, or use a bender with a smaller take-up.

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